217232828 has 12 divisors (see below), whose sum is σ = 382676112. Its totient is φ = 107896800.

The previous prime is 217232819. The next prime is 217232831. The reversal of 217232828 is 828232712.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179225 + ... + 180432.

It is an arithmetic number, because the mean of its divisors is an integer number (31889676).

Almost surely, 2^217232828 is an apocalyptic number.

It is an amenable number.

217232828 is a deficient number, since it is larger than the sum of its proper divisors (165443284).

217232828 is a wasteful number, since it uses less digits than its factorization.

217232828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359812 (or 359810 counting only the distinct ones).

The product of its digits is 21504, while the sum is 35.

The square root of 217232828 is about 14738.8204412701. The cubic root of 217232828 is about 601.1393425356.

The spelling of 217232828 in words is "two hundred seventeen million, two hundred thirty-two thousand, eight hundred twenty-eight".